Dave
I have done some editing of styles and occasionally had problems with endings. This almost always occurred because I had either deleted the ending for the instrument, or not written one.

When you look at the bass track in the style editor, you see the 'a' and 'b' patterns and below that the ending patterns. Check there to see of the notes are the correct duration for your application
Dave


BIAB for Windows Version 2019 (643)
Windows 10 (1909)